Protectors for electric circuits



United States Patent 3,215,006 PROTECTORS FOR ELECTRIC CIRCUTTS Angelo Urani, St. Louis, Mo., assignmto McGraw- Edison Company, Elgin, llL, a corporation of Delaware Filed Mar. 16, 1962, Ser. No. 180,244 3 Claims. (Cl. 813.8)

This invention relates to improvements in protectors for electric circuits. More particularly, this invention relates to improvements in fuse-gripping devices that can be used to remove electric fuses from, and to insert electric fuses into, holders for electric fuses.

It is, therefore, an object of the present invention to provide an improved fuse-gripping device which can remove electric fuses from, and which can insert electric fuses into, holders for electric fuses.

To insure efficient electrical contact between holders for electric fuses and the electric fuses held thereby, it is necessary to make those holders so they can apply substantial pressures to the terminals of those fuses. Such pressures make it difficult to remove electric fuses from, and to insert electric fuses into, holders for electric fuses particularly where the fuses are small and where the holders dispose a plurality of small fuses close to each other.

The pressures which holders for electric fuses apply to the terminals of electric fuses can be so substantial that persons who try to use their fingers to remove those fuses from those holders can find it necessary to try to tightly grip those fuses with their thumbs and forefingers. Such gripping is not always possible where the holders dispose a plurality of small fuses close to each other; and even where such gripping is possible it is not always desirable, because it can lead to engagement between a persons thumb or forefinger and an electrically live fuse termie nalwith resulting shock to that person. Consequently, the use of a persons fingers to remove electric fuses from holders for electric fuses can be objectionable. Where persons fingers can not be used to tightly grip fuses, persons have been known to use screw drivers to try to pry electric fuses out of holders for electric fuses. The use of screw drivers to try to pry electric fuses out of holders for electric fuses can lead to breaking of the casings of those fuses and can lead to short-circuiting of adjacent holders for electric fuses. Consequently, the use of screw drivers to try to pry electric fuses out of holders for electric fuses is objectionable. It would be desirable to provide a fuse-gripping device which could facilitate the removal of electric fuses from, and which could facilitate the insertion of electric fuses into, holders for electric fuses, even where the holders dispose a plurality of small fuses close to each other. The present invention provides such a fuse-gripping device; and it is, therefore, an object of the present invention to provide a fuse-gripping device which can facilitate the removal of electric fuses from, and which can facilitate the insertion of electric fuses into, holders for electric fuses.

The fuse gripping device provided by the present invention has a body with nibs at the opposite ends thereof; and those nibs are formed to accommodate and grip electric fuses. The nibs at each end of the body are normally close to, but out of engagement with, each other; and those nibs can be readily moved apart to enable them to telescope over part of an electric fuse. The fuse-gripping device provided by the present invention has a clamp which is mounted on, but which can be moved relative to, the body of that device; and that clamp can be moved into position to hold the nibs at either end of the body in intimate engagement with that part of the electric fuse over which they are telescoped. As a result, the nibs can be telescoped over a part of an electric fuse and can there- 3,215,006 Patented Nov. 2, 1965 after be clamped in intimate engagement with that part of that fuse so the fuse-gripping device can be used to effect removal of the electric fuse from, or can effect insertion of that electric fuse into, a holder for electric fuses. It is, therefore, an object of the present invention to provide a fuse-gripping device with a body that has nibs at the opposite ends thereof which can be telescoped over parts of electric fuses and which can then be clamped in intimate engagement with those parts of those fuses.

The body and nibs of the fuse-gripping device provided by the present invention are made of insulating material; and hence that device can be used freely adjacent fuse clips without any risk of causing short circuits. Further, the body of the device is made long enough to enable the user thereof to keep his fingers and thumbs spaced away from the holder for electric fuses. All of this is desirable because one of the contacts of a holder for electric fuses is unusually permanently connected to the source of electric power. It is, therefore, an object of the present invention to provide a fuse-gripping device which has an elongated body portion and which has the body portion and nibs thereof made of insulating material.

At least one pair of the nibs on the fuse-gripping device provided by the present invention can be provided with surfaces which will enable that pair of nibs to hold a fuse so its axis is either parallel to or at right angles to the axis of that device. ables that fuse-gripping device to remove electric fuses from different types of fuse holders. It is, therefore, an object of the present invention to provide a fuse-gripping device which has nibs that can hold a fuse so its axis is either parallel to or at right angles to the axis of that device.

Other and further objects and advantages of the present invention should become apparent from an examination of the drawing and accompanying description.

In the drawing and accompanying description a preferred embodiment of the present invention is shown and described but it is to be understood that the drawing and accompanying description are for the purpose of illustration only and do not limit the invention and that the invention will be defined by the appended claims.

In the drawing, FIG. 1 is a perspective view of one embodiment of fuse-gripping device that is made in accordance with the principles and teachings of the present invention,

FIG. 2 is a plan View of the fuse-gripping device of FIG. 1,

FIG. 3 is an elevational view of the rear of the fusegripping device of FIG. 1,

FIG. 4 is an elevational view of the right-hand end of the fuse-gripping device shown in FIGv 3,

FIG. 5 is an elevational view of the left-hand end of the fuse-gripping device shown in FIG. 3,

FIG. 6 is a plan view of the fuse-gripping device shown in FIG. 1 as the nibs at the right-hand end thereof hold a fuse,

FIG. 7 is a plan view of the fuse-gripping device of FIG. 1 as the nibs at the left-hand end thereof hold a fuse, and

FIG. 8 is an elevational front view of the fuse-gripping device of FIG. 1 as the nibs at the right-hand end thereof hold an electric fuse with its axis parallel to the axis of that device.

Referring to the drawing in detail, the numeral 10 generally denotes the body of a fuse-gripping device that is made in accordance with the principles and teachings of the present invention. That body has openings 12 and 14 at opposite sides of the center thereof; and those openings are elongated and have rounded ends. Further, the long axes of those openings are parallel to the long axis This is desirable because it enof the body 10. The inner ends of the openings 12 and 14 are closed, but the outer end of the opening 12 is defined by two spaced abutments 20 and the outer end of the opening 14 is defined by two spaced abutments 22. While the abutments 20 are normally spaced apart and while the abutments 22 are normally spaced apart, as shown by FIG. 1, the abutments 22 can be pressed into intimate engagement with each other as shown by FIG. 8. Similarly, the abutments 20 can be pressed into intimate engagement with each other.

An opening 16 is provided in the body 10, and that opening is disposed outwardly of the opening 12. The inner end of the opening 16 is defined by the spaced abutments 20, and the outer end of that opening is defined by the inner ends of nibs 24. Those nibs are normally spaced apart, as shown by FIGS. 1, 3, 5 and 8; and each of those nibs has a semi-cylindrical recess 26 therein. The recesses 26 are in register with each other, and they coact with each other to substantially define a cylindrical recess which can accommodate the body portion of an electric fuse.

An opening 18 is provided in the body 10 of the fusegripping device, and that opening is disposed outwardly of the opening 14. The inner end of the opening 18 is defined by the abutments 22 and the outer end of that opening is defined by the inner ends of nibs 28. Those nibs are normally spaced apart, as shown by FIGS. 1, 3 and 4; and each of those nibs has a semi-cylindrical recess therein. The recesses 30 are in register with each other, and they co-act to substantially define a cylindrical recess which can accommodate the body portion of an electric fuse. Each of the nibs 28 also has a semi-cylindrical recess 32; and those recesses are disposed in register with each other to substantially define a cylindrical recess which can accommodate the ferrule-like terminal of an electric fuse. The axis of the recess defined by the semi-cylindrical recesses 30 is disposed at right angles to the long axis of the body 10, whereas the axis of the recess defined by the two semi-cylindrical recesses 32 is parallel to the long axis of that body.

The openings 12 and 16 coact to define two elongated arm for the left-hand end of the body 10; and each of those arms has a nib 24 at the free end thereof. Those arms will be fairly stifi but will be capable of being bent to move those nibs toward each other. Similarly, the openings 14 and 18 coact to define two elongated arms for the right-hand end of the body 10; and each of those arms has a nib 28 at the free end thereof. Those arms Will be fairly stiff but will be capable of being bent to move those nibs toward each other.

Those portions of the upper and lower faces of the body 10, which are in register with the openings 16 and 18, are inclined to the long axis of that body so they diverge from each other. Further, those portions have minute corrugations formed on them. Specifically, those portions of the upper and lower faces of the body 10 which are in register with the opening 16 have minute corrugations 34 thereon. Those portions of the upper and lower faces of the body 10 which are in register with the opening 18 have minute corrugations 36 thereon.

The numeral 38 denotes a clamp which has a large plane central portion that abuts the rear face of the body 10; and that clamp also has a top and a bottom 42 which extend forwardly at right angles from that large plane portion. A flange 44 extends downwardly from the forward edge of the top 40 and a flange 46 extends upwardly from the forward edge of the bottom 42. Those flanges abut the front face of the body 10 and help prevent separation of the clamp 38 from the body 10. The opposite ends of the top 40 are bent upwardly at slight angles, and the opposite ends of the bottom 42 are bent downwardly at slight angles. While those angles are slight, they are large enough to facilitate the telescoping of those ends over the minute corrugations 34 and 36. The top 40 and the bottom 42 have minute corruga- 4 tions thereon, and those minute corrugations can coact with the minute corrugations 34 and 36 to prevent accidental shifting of the clamp 38 out of engagement with those corrugations.

Normally, the clamp 38 will be adjacent the center of the body 10 of the fuse-gripping device; and at such time the abutments 26 will be spaced apart, the abutments 22 will be spaced apart, the nibs 24 will be spaced apart, and the nibs 28 will be spaced apart as shown by FIGS. 1 and 3. To use the fuse-gripping device provided by the present invention, the user can set the outer ends of the nibs 28 in engagement with the body portion of an electric fuse 48 and force the body 10 to move to the right until the nibs 28 bow away from each other sufficiently to enable the right-hand ends of those nibs to telescope over the body portion of that fuse. Thereafter, the resilience of the arms at the right-hand end of the body 10 will cause those nibs to return to their normal positions; and as those nibs do so they will center the body portion of that fuse within the substantially cylindrical recess defined by the semi-cylindrical recesses 30 in those nibs. While the resilience of the arms at the right-hand end of the body 10 is great enough to enable the substantially cylindrical recess defined by the semi-cylindrical recesses 38 in the nibs 28 to hold the fuse 48, that resilience may not be enough to hold that fuse as the fusegripping device is used to pull that fuse away from the fuse holder which normally holds that fuse. Consequently, the user of the fuse-gripping device will shift the clamp 38 toward the right-hand end of the body 10 until the minute corrugations on the top 40 and bottom 42 engage the minute corrugations 36. As the minute corrugations on the top 413 and bottom 42 engage the minute corrugations 36, the inclined surfaces on which the minute corrugations 36 are formed will be forced toward each other with consequent forcing of the abutments 22 toward each other and with consequent forcing of the nibs 28 into intimate engagement with the body portion of the fuse 48. Thereafter, the user can easily remove the fuse 48 from the holder therefor, as by pulling on the body 10.

Once the fuse 48 has been removed from the holder therefor, the clamp 38 can be returned to its normal position; and thereupon the resilience of the arms at the right-hand end of the body 10 will cause the abutments 22 to move apart and will cause the nibs 28 to move to the position shown by FIGS. 1 and 3. Thereupon, it will be a simple matter for the user to remove the fuse 48 from the substantially cylindrical recess defined by the semicylindrical recesses 30 in those nibs.

It will be noted that in using the fuse-gripping device provided by the present invention, the user did not have,

to place his fingers close to the fuse 48 or to the holder for that fuse. Instead, he could grip the body 10 at a point adjacent the minute corrugations 34 as he forced the nibs 28 to move apart and to telescope over the body portion of the fuse 48. Thereafter, he could continue to grip the body 10 adjacent the minute corrugations 34 as he gripped the clamp 38 and moved the top 40 and bottom 42 thereof into engagement with the minute corrugations 36. This means that at no time was the user of the fusegripping device provided by the present invention exposed to an electric shock.

To insert the electric fuse 48 in the holder therefor, the user of the fuse-gripping device provided by the present invention can readily cause the nibs 28 to move apart to permit the disposing of the body portion of that fuse within the generally cylindrical recess defined by the semi-cylindrical recesses 30 in those nibs. Thereafter, the user can shift the clamp 38 toward the right-hand end of the body 10 until the top 40 and bottom 42 thereof engage the minute corrugations 36, thereby forcing the abutments 22 toward each other and forcing the nibs 28 into intimate engagement with the body portion of that fusev At such time, the fuse-gripping device will be gripping the body portion of the fuse 48 very tightly; and

hence that fuse-gripping device can be used to force that fuse into the holder for that fuse. Thereafter, the user can grip the clamp 38 and return it to its normal position; and thereupon the abutments 22 will move apart and the nibs 28 will return to the position shown by FIGS. 1 and 3. This means that a pull on the body of the fuse-gripping device will facilitate ready separation of that fuse-gripping device from the body portion of the fuse 48.

Under normal conditions of usage of the fuse-gripping device, the abutments 22 will be moved close to each other but will not be moved into engagement with each other. If an unusually heavy force were to be applied to the clamp 38, as that clamp was being moved toward the nibs 28, the abutments 22 could be forced into engagement with each other. As those abutments engaged each other, they would prevent further bending of the arms, at the right-hand end of the body 10, toward each other. This is desirable because excessive bending of those arms toward each other could bow the outer ends of the nibs 28 away from each other and thereby reduce the forces which those nibs apply to the body portion of the fuse 48.

When the nibs 24 are to be used to grip a fuse 50, the outer ends of those nibs can be placed in engagement with the body portion of that fuse and can be forced apart until those nibs telescope over the body portion of that fuse. Thereafter, the clamp 38 can be moved toward the left-hand end of the body 10 and set in engagement with the minute corrugations 34. The top 40 and the bottom 42 of the clamp 38 will apply bending forces to the arms at the left-hand end of the body 10 and thereby cause the nibs 24 to apply intimate and heavy pressures to the body portion of the fuse 50.

It will be noted that the nibs 24 are narrower than the nibs 28. This means that the nibs 24 will be used whenever very short electric fuses are to be gripped, and that the nibs 28 will be used when longer electric fuses are to be gripped.

The generally cylindrical recesses which are defined by the semi-cylindrical recesses 26 in the nibs 24 and by the generally semi-cylindrical recesses 30 in the nibs 28 can serve to hold the body portions of electric fuses at right angles to the long axis of the "body 10 of the fuse-gripping device. The generally cylindrical recess defined by the semi-cylindrical recesses 32 in the nibs 28 can grip the ferrule-like terminal of an electric fuse 52 and thereby hold the axis of that fuse parallel to the axis of the body 18 of the fuse-gripping device. Specifically, when the clamp 38 is adjacent the center of the body portion 10, the nibs 28 can have the outer ends of the semi-cylindrical recesses 32 telescoped over the end of a ferrule-like terminal of the fuse 52. Thereafter, the top 40 and bottom 42 of the clamp 38 can be moved into engagement with the minute corrugations 36 to apply bending forces to the arms at the right-hand end of the body 10. Those bending forces will enable the semi-cylindrical recesses 32 in the nibs 28 to apply intimate and strong forces to the ferrule-like terminal at the left-hand end of the fuse 50. Those forces will be sufficiently intimate to enable the fuse-gripping device to remove the fuse 52 from the fuse holder which normally holds that fuse or to insert that fuse into that fuse holder. Once the fuse 52 has been removed from, or inserted into, the fuse holder which normally accommodates it, the clamp 38 can be returned to its normal position; and thereupon the nibs 28 can readily be separated from the ferrule-like terminal of the fuse 52.

The inclined portions, adjacent the openings 16 and 18, act as inclined planes. Also, those portions act as stops, in preventing separation of the clamp 38 from the body 10.

The inner ends of the nibs 24 and 28 are closer together than are the outer ends of those nibs. This is desirable because it keeps the casings of fuses from passing inwardly beyond those nibs.

The minute corrugations 34 and 36 on the body 18 and the minute corrugations on the top 40 and bottom 42 of the clamp 38 are very useful in preventing accidental shifting of that clamp relative to that body. However, those minute corrugations could be supplanted by other surfaces which would provide a high coefficient of friction.

One preferred embodiment of fuse-gripping device that has been made in accordance with the principles and teachings of the present invention has effectively gripped fuses which had fuse casings with diameters of less than one quarter of an inch. The ni'bs 24 on that embodiment were only one-eighth of .an inch wide and thus enabled that embodiment to grip fuses which had overall lengths as small as five-eights of an inch.

Whereas the drawing and accompanying description have shown and described a preferred embodiment of the present invention, it should be apparent to those skilled in the art that various changes may be made in the form of the invention without affecting the scope thereof.

What I claim is:

1. A fuse-gripping device which comprises:

(a) a body which has openings disposed outwardly from the center thereof,

(b) the inner ends of said openings being the outer ends of said openings being abutments that are normally spaced apart,

(c) said abutments being in register with each other,

(d) further openings in said body disposed outwardly of the first said openings and having the inner ends thereof defined by said abutments,

(e) the first said openings and said further openings coacting to define elongated bendable arms at the opposite ends of said body,

(f) nibs at the outer ends of said body that confront and extend toward each other and that define the free ends of said elongated bendable arms,

(g) said nibs normally being spaced apart but being movable toward each other,

(h) said nibs having the outer ends thereof spaced further apart than the inner ends thereof,

(i) said inner ends of said nibs defining the outer ends of said further openings,

(j) semi-cylindrical recesses in said nibs that are in register with each other to define generally cylindrical recesses,

(k) further semi-cylindrical recesses in the nibs at the end of said body that are in register with each other to define a further generally cylindrical recess,

(1) said further generally cylindrical recess having the axis thereof parallel to the long axes of said elongated bendable arms,

(m) the first said generally cylindrical recesses having the axes thereof at right angles to the long axes of said elongated bendable arms,

(n) said body having those portions thereof which are in register with said further openings inclined so they diverge from each other,

(0) minute corrugations on said inclined portions,

(p) a clamp with a top and a bottom which can engage said inclined portions and thereby urge said nibs toward each other,

(q) said top and said bottom of said clamp having minute corrugations thereon which can engage said minute corrugations on said inclined portions to prevent accidental shifting of said clamp relative to said inclined portions,

(r) said top and said bottom of said clamp coacting with said inclined portions to cause said elongated tfirms to force said nibs into intimate engagement with uses,

(s) said inclined portions serving as stops to prevent separation of said clamp from said body,

(t) said body and said nibs being formed of insulating material,

(u) said inner ends of said nibs serving as stops for fuses and thereby helping position said fuses in said generally cylindrical recesses,

closed and defined by (v) the nibs at one end of said body being narrower than the nibs at the other end of said body to accommodate short fuses,

(w) said abutments being engageable with each other to keep excessive forces on said clamp from bending said elongated arms far enough towards each other to crush a fuse or to bow the outer ends of said nibs away from each other and thereby reduce the forces which said nibs apply to fuses held thereby (x) said clamp being slidable along said elongated arms away from said nibs to permit said nibs to move away from each other and being slidable along said elongated arms toward said nibs to force said nibs to move toward each other.

2. A fuse-gripping device which comprises:

(a) a body that has an opening therein,

(b) the inner end of said opening being closed and the outer end of said opening being defined by abutments that are normally spaced apart,

(c) said abutments being in register with each other,

(d) a further opening in said body disposed outwardly of the first said opening and having the inner end thereof defined by said abutments,

(e) the first said opening and said further opening coacting to define elongated bendable arms at one end of said body,

(f) nibs at said one end of said body that confront and extend toward each other and that define the free ends of said elongated bendable arms,

(g) said nibs normally being spaced apart but being movable toward each other,

(h) said nibs having the outer ends thereof spaced further apart than the inner ends thereof,

(i) said inner ends of said nibs defining the outer end of said further opening,

(j) semi-cylindrical recesses in said nibs that are in register with each other to define a generally cylindrical recess,

(k) further semi-cylindrical recesses in said nibs that are in register with each other to define a further generally cylindrical recess,

(1) said further generally cylindrical recess having the axis thereof parallel to the long axes of said elongated bendable arms,

(m) the first said generally cylindrical recess having the axis thereof at right angles to the long axes of said elongated bendable arms,

(11) said body having those portions thereof which are in register with said further opening inclined so they diverge from each other, e

() minute corrugations on said inclined portions, and

(p) a clamp with a top and a bottom which can engage said inclined portions and thereby urge said nibs toward each other,

(q) said top and said bottom of said clamp having minute corrugations thereon which can engage said minute corrugations on said inclined portions to prevent accidental shifting of said clamp relative to said inclined portions,

(r) said top and said bottom of said clamp coacting with said inclined portions to cause said elongated arms to force said nibs into intimate engagement with fuses,

(s) said inclined portions serving as stops to prevent separation of said clamp from said body,

(t) said body and said nibs being formed of insulating material,

(u) said inner ends of said nibs serving as stops for fuses and thereby helping position said fuses in said generally cylindrical recesses,

(v) said abutments being engageable with each other to keep excessive forces on said clamp from bending said elongated arms far enough towards each other to crush a fuse or to bow the outer ends of said nibs away from each other and thereby reduce the forces which said nibs apply to fuses held thereby (w) said clamp being slidable along said elongated arms away from said nibs to permit said nibs to move away from each other and being slidable along said elongated arms toward said nibs to force said nibs to move toward each other.

3. A fuse-gripping device which comprises:

(a) a body that has an opening therein,

(b) one end of said opening being closed and the other end of said opening being defined by abutments,

(c) said abutments being in register with each other,

(d) a further opening in said body having one end thereof defined by said abutments,

(e) the first said opening and said further opening coacting to define elongated bendable arms for said body,

(f) said elongated bendable arms being stiff and being resistant to bowing intermediate the ends thereof, (g) nibs on the free ends of said elongated bendable arms,

(h) said nibs being movable relative to each other,

(i) said nibs having the outer ends thereof spaced apart,

(j) the inner ends of said nibs defining the outer end of said further opening,

(k) partial recesses in said nibs that are in register with each other to define a substantially complete recess,

(1) said body having those portions thereof which are in register with said further opening inclined so they diverge from each other, and

(m) a clamp with a top and a bottom which can engage said inclined portions and thereby urge said nibs toward each other,

(n) said top and said bottom of said clamp coacting with said inclined portions to cause said elongated arms to force said nibs into intimate engagement with fuses,

(0) said inclined portions serving as stops to prevent seperation of said clamp from said body,

(p) said body and said nibs being formed of insulating material,

(q) said inner ends of said nibs serving as stops for fuses and thereby helping position said fuses in said substantially complete recess,

(1') said abutments being engageable with each other to keep excessive forces on said clamp from bending said elongated arms far enough towards each other to crush a fuse or to bow the outer ends of said nibs away from each other and thereby reduce the forces which said nibs apply to fuses held thereby,

(s) said inclined portions being disposed, at least in part, outwardly beyond said abutments and inwardly of said nibs, whereby said clamp can coact with said inclined portions to apply clamping forces to said elongated bendable arms intermediate said abutments and said nibs.

References Cited by the Examiner UNITED STATES PATENTS 157,293 12/74 Pitt 8143 745,070 11/03 McKibben 8 l43 1,363,515 12/20 Knoss 8l3.8 1,374,485 4/21 Berecky et al 248 l 1,661,365 3/28 Gendron 81-51 2,988,314 6/61 Urich.

WILLIAM FELDMAN, Primary Examiner.

WALTER A. SCHEEL, Examiner. 

1. A FUSE-GRIPPING DEVICE WHICH COMPRISES: (A) A BODY WHICH HAS OPENINGS DISPOSED OUTWARDLY FROM THE CENTER THEREOF, (B) THE INNER ENDS OF SAID OPENINGS BEING CLOSED AND THE OUTER ENDS OF SAID OPENINGS BEING DEFINED BY ABUTMENTS THAT ARE NORMALLY SPACED APART, (C) SID ABUTMENT BEING IN REGISTER WITH EACH OTHER, (D) FURTHER OPENINGS IN SAID BODY DISPOSED OUTWARDLY OF THE FIRST SAID OPENINGS AND HAVING THE INNER ENDS THEREOF DEFINED BY SAID ABUTMENTS, (E) THE FIRST SAID OPENINGS AND SAID FURTHER OPENINGS COACTING TO DEFINE ELONGATED BENDABLE ARMS AT THE OPPOSITE ENDS OF SAID BODY, (F) NIBS AT THE OUTER ENDS OF SID BODY THAT CONFRONT AND EXTEND TOWARD EACH OTHER AND THAT DEFINE THE FREE ENDS OF SAID ELONGATED BENDABLE ARMS (G) SAID NIBS NORMALLY BEING SPACED APART BUT BEING MOVABLE TOWARD EACH OTHER, (H) SAID NIBS HAVING THE OUTER ENDS THEREOF SPACED FURTHER APART THAN THE INNER ENDS THEREOF, (I) SAID INNER ENDS OF SAID NIBS DEFINING THE OUTER ENDS OF SAID FURTHER OPENINGS, (J) SEMI-CYLINDRICAL RECESSES IN SID NIBS THAT ARE IN REGISTER WITH EACH OTHER TO DEFINE GENERALLY CYLINDRICAL RECESS, (K) FURTHER SEMI-CYLINDRICAL RECESSES IN THE NIBS AT THE END OF SAID BODY THAT ARE IN REGISTER WITH EACH OTHER TO DEFINE A FURTHER GENERALLY CYLINDRICAL RECESS, (L) SAID FURTHER GENERALLY CYLINDRICAL RECESS HAVING THE AXIS THEREOF PARALLEL TO THE LONG AXES OF SAID ELONGATED BENDABLE ARMS, (M) THE FIRST SAID GENERALLY CYLINDRICAL RECESSES HAVING THE AXES THEREOF AT RIGHT ANGLES TO THE LONG AXES OF SAID ELONGATED BENDABLE ARMS, (N) SAID BODY HAVING THOSE PORTIONS THEREOF WHICH ARE IN REGISTER WITH SAID FURTHER OPENINGS INCLINED SO THEY DIVERGE FROM EACH OTHER, (O) MINUTE CORRUGATIONS ON SAID INCLINED PORTIONS, (P) A CLAMP WITH A TOP AND A BOTTOM WHICH CAN ENGAGE SAID INCLINED PORTIONS AND THEREBY URGE SID NIBS TOWARD EACH OTHER, (Q) SAID TOP AND SAID BOTTOM OF SAID CLAMP HAVING MINUTE CORRUGATIONS THEREON WHICH CAN ENGAGE SAID MINUTE CORRUGATIONS ON SAID INCLINED PORTIONS TO PREVENT ACCIDENTAL SHIFTING OF SID CLAMP RELATIVE TO SAID INCLINED PORTIONS, (R) SAID TOP AND SAID BOTTOM OF SAID CLAMP COACTING WITH SAID INCLINED PORTIONS TO CAUSE SAID ELONGATED ARMS TO FORCE SAID NIBS INTO INTIMATE ENGAGEMENT WITH FUSES, (S) SAID INCLINED PORTIONS SERVING AS STOPS TO PREVENT SEPARATION OF SAID CLAMP FROM SAID BODY, (T) SAID BODY AND SID NIBS BEING FORMED OF INSULTATING MATERIAL, (U) SAID INNER ENDS OF SID NIBS SERVING AS STOPS FOR FUSES AND THEREBY HELPING POSITION SAID FUSES IN SAID GENERALLY CYLINDRICAL RECESSES, (V) THE NIBS AT ONE END OF SAID BODY BEING NARROWER THAN THE NIBS AT THE OTHER END OF SAID BODY TO ACCOMMODATE SHORT FUSES, (W) SAID ABUTMENTS BEING ENGAGEABLE WITH EACH OTHER TO KEEP EXCESSIVE FORCES ON SAID CLAPM FROM BENDING SAID ELONGATED ARMS FAR ENOUGH TOWRDS EACH OTHER TO CURSH A FUSE OR TO BOW THE OUTER ENDS OF SAID NIBS AWAY FROM EACH OTHER AND THEREBY REDUCE THE FORCES WHICH SAID NIBS APPLY TO FUSES HELD THEREBY (X) SAID CLAMP BEING SLIDABLE ALONG SAID ELONGATED ARMS AWAY FROM SAID NIBS TO PERMIT SAID NIGS TO MOVE AWAY FROM EACH OTHER AND BEING SLIDABLE ALONG SAID ELONGATED ARMS TOWARD SAID NIBS TO FORCE SAID NIBS TO MOVE TOWARD EACH OTHER. 